CN100431198C - Thin battery structure using sheath film, battery pack and manufacturing method for the battery pack - Google Patents
Thin battery structure using sheath film, battery pack and manufacturing method for the battery pack Download PDFInfo
- Publication number
- CN100431198C CN100431198C CNB2004100841075A CN200410084107A CN100431198C CN 100431198 C CN100431198 C CN 100431198C CN B2004100841075 A CNB2004100841075 A CN B2004100841075A CN 200410084107 A CN200410084107 A CN 200410084107A CN 100431198 C CN100431198 C CN 100431198C
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- China
- Prior art keywords
- frame section
- circuit board
- battery cell
- board unit
- contact sheet
- Prior art date
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- Expired - Fee Related
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0472—Vertically superposed cells with vertically disposed plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/106—PTC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49114—Electric battery cell making including adhesively bonding
Abstract
Provided is a thinner, lighter battery pack and to reduce the cost by eliminating the need for a battery case. A thin battery pack structure using an outer packaging film (battery pack) is constructed by a flat and rectangular shaped battery cell, a flat and rectangular shaped frame portion accommodating the battery cell, a circuit board unit disposed on the outer side surface of the frame portion, a cap portion mounted on one ends of the frame portion and the battery cell so as to sandwich the circuit board unit with the outer side surface of the frame portion, and an outer packaging film for integrally covering the rectangular battery cell and the frame portion.
Description
Technical field
The present invention relates to a kind of Thin battery structure, battery pack that covers with wrapping film and the method that is used to make battery pack, this battery structure or battery pack are as the battery of mobile phone, game machine, notebook PC and similar devices thereof.
Background technology
A kind of battery structure and battery pack as shown in figure 10 is known.Battery pack 101 is made of rectangular battery main body that contains the element that produces electricity therein (below be called " battery cell ") 103 and circuit board unit 105; a plurality of electronic components 104 are installed to constitute a protective circuit on circuit board unit; these a plurality of electronic units are housed in the battery case 102, and this battery case is made of two and half ones of a thin case.It should be noted that as shown in figure 11 circuit board unit 105 is supported by the rib 106 that is arranged on the battery case 102, makes electronic component 104 not contact with battery cell 103.As shown in figure 12, equally know, have the model resin bed of a kind of battery pack by being formed for molded electronic component 104 (below be called " transmission mould ", " transfer mold ") 110 eliminated needs to rib 106, place, end at model resin bed 110 is formed with a flat surfaces 110a so that contact with the flat surfaces 103a of battery cell 103, and they are encapsulated in this battery case.(for example, referring to patent documentation 1: Japanese Patent Application Publication (is seen paragraph [0003] and [0006], Fig. 2, Fig. 5, Fig. 6 etc. 2002-110121 number.))
Yet above-mentioned traditional battery pack 101 has following defective.
(1) because conventional batteries 101 is configured to hold rectangular battery Battery pack 103 and circuit board unit 105; a plurality of electronic components 104 are installed on this circuit board unit are arranged in the protective circuit of the battery case 102 that two and half ones by thin case constitute, thereby battery pack 101 thickenings, volume becomes big and weight becomes heavy with formation.And its cost is also higher.Especially, often thickness increases battery cell 103 owing to the expansion of its middle body when charging or at high temperature.Therefore, need consider that the swell increment of battery cell 103 designs the size of battery case 102, thereby between battery case 102 and battery cell 103, need certain space to be used to absorb this expansion.This makes that battery case 102 is relatively large, and this also is the reason that the battery cell 103 shared volume ratios in the battery pack 101 reduce usually.
(2) by make be positioned at can be molded and the flat surfaces 110a of the end of the transmission mould 110 of protection electronic component 104 contact with the flat surfaces 103a of battery cell 103 under the situation eliminated to the needs of rib 106; if will transmit mould 110 firmly is pressed on the battery cell 103, then will cause adverse effect more or less to electronic component 104 or like.
Summary of the invention
The invention provides a kind of thinner, more small-sized and battery pack of lightweight more, and reduced cost by the needs of eliminating the battery case that two and half ones by thin case are constituted.
Another aspect of the present invention is to be used to prevent with transfer molding to battery cell, thus the protection electronic component.
According to a first aspect of the invention, be the needs that are used to eliminate to two and half ones of traditional battery case, its thin battery that adopts (structure) comprising: the battery cell that is configured as flattened rectangular, wherein be installed in the frame section of battery cell, be arranged on the circuit board unit on the outer surface of frame section, install so that the cap portion that with the outer surface of frame section circuit board unit is clipped in the middle at an end of frame section and battery cell, and the wrapping film of whole clad battery Battery pack and frame section, wherein the side surface of battery cell is encapsulated by frame section, and the front surface of battery cell and rear surface week wrapping film cover.
According to a second aspect of the invention, comprise frame section and cap portion and will approach with respect to height not with the zone (portion is not wrapped) of wrapping film parcel with the zone (parcel portion) of wrapping film parcel, thin amount is equivalent to the thickness of wrapping film, and at least one outer surface of frame section is higher than the side surface of battery cell.
According to a third aspect of the invention we, thin battery according to first aspect forms in the following manner, be about to the side that galvanic anode portion assembling window is arranged on frame section, so that its with match from the outstanding galvanic anode portion of the side surface of battery cell, and the circuit board unit installation portion is arranged on the outer surface of side of frame section.
According to a forth aspect of the invention, form in the following manner according to the thin battery of the third aspect, promptly cap portion comprises: the rectangular end face is used for being clipped in the middle with the circuit board unit that frame section will be installed on the installation portion; And tube, the facial progressive forming of itself and rectangular end, and have the outer perimeter portion of installation portion, and comprise hollow bulb with the end that attaches it to frame section and battery cell, it is arranged on one of bight of being formed by end face portion and tube.
According to a fifth aspect of the invention, thin battery according to first aspect forms in the following manner, being about to be exposed to outside termination contact portion by the terminal window is arranged on the end face portion of cap portion, electronic component and the transmission mould that is used for molded electronic component are arranged on the inner surface of frame oriented portion, and frame section comprises and is arranged on the surface of circuit board unit and to the side-prominent protuberance of circuit board unit, wherein this circuit board unit will be assembled and fix, so that it is sandwiched between frame section and the cap portion, thereby between end of transmitting mould and frame section, produce predetermined gap (little gap).
According to a sixth aspect of the invention, battery pack is a flattened rectangular, and have comprise termination contact portion and with the vertical first surface of first type surface, with first surface opposing second surface, first side surface vertical and second side surface relative with first side surface with first type surface, this battery pack comprises: the circuit board unit that constitutes termination contact portion; Cap portion, comprise have the first surface that termination contact portion can be exposed to outside terminal window and with the continuous tube of first surface; The flattened rectangular battery cell; Frame section, wherein the position towards the main surface portion of battery cell is open, and comprises four four side surfaces vertical with main surface portion, one of them surface is a second surface; And wrapping film, its whole clad battery Battery pack and frame section.
According to a seventh aspect of the invention, battery pack according to a sixth aspect of the invention comprises frame section and cap portion and will approach with respect to the thickness with the zone of wrapping film parcel not with the zone of wrapping film parcel that thin amount (thickness difference) is equivalent to the thickness of wrapping film.
According to an eighth aspect of the invention, the side surface that is higher than one of at least battery cell in the outer surface of the frame section of battery pack according to a sixth aspect of the invention.
According to a ninth aspect of the invention, an end of the circuit board unit of battery pack according to a sixth aspect of the invention is connected with the other end of positive contact sheet, wherein an end with the positive contact sheet is connected with the galvanic anode portion of battery cell, the other end of circuit board unit is connected with an end of negative contact sheet, the other end of the other end of negative contact sheet and PTC tab utilizes weld part and interconnects, wherein the PTC tab end is connected with cell cathode portion, and weld part is arranged on one of first side surface and second side surface.
According to the tenth aspect of the invention, in battery pack according to a ninth aspect of the invention, weld part is positioned to be arranged on the inboard of peristome of the side surface of frame section.
According to an eleventh aspect of the invention, in the battery pack according to ninth aspect present invention, the positive contact sheet is provided as L shaped, and wherein its longer side is connected with the galvanic anode portion of battery cell, and its shorter side is connected with an end of circuit board unit.
According to the 12 aspect of the battery pack of ninth aspect present invention, the positive contact sheet is formed by a metal polar plate, and this metallic plate will carry out annealing in process.
According to a thirteenth aspect of the invention, in according to the battery pack of ninth aspect present invention, the negative contact sheet is L shaped, and wherein its shorter side is connected with the other end of circuit board unit.
According to a fourteenth aspect of the invention, in battery pack according to tenth aspect present invention, one end of the longer side of the other end of PTC tab and negative contact sheet is overlapping at the peristome place, wherein, one end of PTC tab is welded in the cell cathode portion of battery cell, and the shorter side of negative contact sheet is connected with the other end of circuit board unit.
According to a fifteenth aspect of the invention, in the battery pack aspect the 14 according to the present invention, the slit of the side surface of the longer side of negative contact sheet by being arranged on framework inserts frame section, and overlapping with the PTC tab in peristome.
According to a sixteenth aspect of the invention, in battery pack according to sixth aspect present invention, frame section is provided with the cap support portion in the tube that will insert cap portion, and by in the tube that the cap support portion is inserted cap portion cap portion is linked to each other with frame section.
According to a seventeenth aspect of the invention, in the battery pack aspect the 16 according to the present invention, cap portion engaging claw and pawl conjugate foramen are separately positioned on the tube of cap support portion and cap portion, and when the tube of cap portion was inserted in the cap support portion, cap portion engaging claw and pawl conjugate foramen were engaged with each other.
According to an eighteenth aspect of the invention, provide a kind of manufacture method of battery pack, may further comprise the steps: the battery number of assembling steps, the battery cell that is used for being configured as flattened rectangular is installed in the rectangular frame; The circuit board unit Connection Step, the circuit board unit that is used for having the terminal connecting portion is connected to battery cell; The cap portion installation steps are used for cap portion is installed to frame section; And wrapping film covering step, be used for covering the frame section that is installed in battery cell by wrapping film.
According to a nineteenth aspect of the invention, in the manufacture method of the tenth eight aspect according to the present invention, the circuit board unit Connection Step comprises: be used for when the end with the positive contact sheet is connected to the galvanic anode portion of battery cell, the positive contact sheet is offered the step of battery cell with the end face of frame section; Be used for the other end of positive contact sheet is connected to the step of an end of circuit board unit; Be used for when an end with the negative contact sheet is connected to the opposite side of circuit board unit, providing the step of the side surface of negative contact sheet and battery cell; Be used for when an end with the PTC tab is connected to the cell cathode portion of battery cell, providing the step of the side surface of PTC tab and battery cell; And the tab welding step, be used to weld the end of PTC tab and cell cathode portion, it is overlapped each other.
According to a twentieth aspect of the invention, in the manufacture method aspect the 19 according to the present invention, being used for the step that a end with the positive contact sheet is connected to the galvanic anode portion of battery cell comprises: be used for the longer side of positive contact sheet and the galvanic anode portion step of connecting of battery cell, wherein the positive contact sheet is made by metal polar plate, will carry out annealing in process to metal polar plate, and forming sheet metal is L shaped; And the step that is used for the shorter side of L shaped positive contact sheet is connected to circuit board unit.
According to a twenty-first aspect of the invention, in the manufacture method aspect the 20 according to the present invention, in the step that is used for an end of negative contact sheet is connected to the other end of circuit board unit, its shorter side is connected to the other end of circuit board unit, the longer side of the simultaneously smooth L shaped type negative contact sheet parallel with the longer side of positive contact sheet.
According to a twenty-second aspect of the invention, in the manufacture method of the 20 one side according to the present invention, by the slit on the side that is arranged on frame section the longer side of L shaped negative contact sheet is inserted frame section, wherein in frame section, the shorter side of negative contact sheet is connected to circuit board unit, and overlapping with the end of PTC tab, and in the tab welding step, overlapping portion is welded at the side surface place of battery cell (negative contact sheet).
According to a twenty-third aspect of the invention, in the manufacture method aspect the 22 according to the present invention, the peristome of the side surface of the welding step that is used for PTC tab and negative contact sheet by being arranged on frame section carries out.
Battery pack according to the present invention shows following advantage.
(1) battery pack according to a first aspect of the invention is characterised in that, the external packing body of battery pack by frame section, cap portion, and wrapping film constitute, thereby replaced the battery case of forming by two and half ones that approach case, thereby eliminated deviation appears in externally measured and in, obtained thinner, more small-sized and the battery pack of lightweight more, and reduced cost.
Especially, comprise frame section and cap portion and will approach with respect to height not with the zone (portion is not wrapped) of wrapping film parcel with the zone (parcel portion) of wrapping film parcel, thin amount is equivalent to the thickness of wrapping film, and it is concordant each other that wrapping film parcel zone and wrapping film do not wrap up the zone behind parcel, thereby avoided having a step herein.
Can be in the altitude range of frame section and cap portion, even, be steady state value according to battery pack of the present invention thereby keep the thickness of battery pack between charge period or under the condition that expands the most at high temperature with the thickness limits of the battery cell that is installed in.
Can when be installed in battery cell in the frame section, engage with the galvanic anode engagement window of frame section by galvanic anode portion, and battery cell and frame section are combined according to battery pack of the present invention battery cell.And the end complete face of galvanic anode portion is to the outer surface of frame section one side, thereby makes it be easy to set up and being electrically connected of circuit board unit, and wherein this circuit board unit will be installed on the installation portion on the outer surface that is positioned at frame section one side.
Can prevent that according to battery pack of the present invention frame section from separating with battery cell, in the periphery at the place, end by cap portion being installed to frame section and battery cell, thereby frame section and battery cell be combined with cap portion.In addition, even wrapping film may be peelled off because of carelessness, owing to the anode portion on the side surface of battery cell is covered by cap portion, thereby also can prevent to expose anode portion, thereby guarantee fail safe.
Usually make between the transmission mould of circuit board unit and the frame section according to battery pack of the present invention to keep contactless state, spaced a predetermined distance from.Yet, since the pressure of respective terminal and with the termination contact portion of circuit board unit under the situation of frame section extruding, though transmitting the end of mould is pressed on the outer surface of framework, because circuit board unit is pressed on the tab that is arranged on the frame section, thereby avoided the transmission mould to be pressed on the frame section heavyly.
(2) will battery pack according to the present invention be configured to by covering the rectangular battery Battery pack with wrapping film and frame section has the external packing body,, and its cost be reduced so that can make battery pack attenuation, miniaturization, and lighting.Especially, it is concordant each other that wrapping film parcel zone (at this parcel wrapping film) and wrapping film do not wrap up zone (not wrapping up wrapping film at this), thereby avoided forming a step herein by wrap up wrapping film on battery surface.
In addition, the height of second end face of frame section is arranged to be higher than the side surface of battery cell,, also can absorbs the expansion of battery cell by thickness difference even making to produce at battery cell between charge period or under the high temperature expands.
And, the weld part of negative contact sheet and PTC tab is arranged on first side surface or second side surface, so that can carry out both welding.Especially, peristome is arranged on the side surface of the frame section relative with weld part, so that can pass through opening welded cathode tab and PTC tab.
Be configured as the positive contact sheet L shaped, wherein its longer side is connected to the galvanic anode portion of battery cell, and its shorter side is connected to an end of circuit board unit, so that bend to the end face overlaid that approximate right angle makes circuit board unit and frame section by the shorter side that makes the positive contact sheet.Especially, the positive contact sheet is formed by the metal polar plate that will carry out annealing in process, to be convenient to crooked positive contact sheet and to have eliminated the appearance of the restoring force at bend place.
In addition, be configured as the negative contact sheet L shaped, wherein its shorter side is connected with the other end of circuit board unit, and its longer side is extended with the right angle from the other end of circuit board unit, feasible end face by superposing circuit plate unit and battery cell, and the longer side of negative contact sheet is alignd automatically with the side surface of battery cell.Especially, slit is arranged on the side of frame section, makes and the longer side of negative pole part is inserted framework, can make the longer side of negative pole part and PTC tab overlapping at the peristome place by slit.
And, be inserted into by the cap portion that will be arranged on frame section in the tube of cap portion, can easily be installed to frame section to cap portion.Especially, cap portion engaging claw and pawl conjugate foramen are arranged on the tube of cap support portion and cap portion, make to prevent that cap portion breaks away from from frame section.
(3) manufacture method according to battery pack of the present invention comprises: be used for the battery that battery cell with flattened rectangular is installed in rectangular frame and be installed in step; The circuit board unit that is used for having the terminal connecting portion is connected to the circuit board unit Connection Step of battery cell; Be used for cap portion is installed to cap portion installation steps on the frame section; And the wrapping film covering step that is used for covering by wrapping film the frame section that is installed in battery cell, make by frame section, battery cell and cap portion are become one, can make lightweight and thin battery pack.
Especially, the side surface of positive contact sheet, negative contact sheet and PTC tab and battery cell together is provided with, and carry out the welding of negative contact sheet and PTC tab, thereby be easy to carry out the connection work of circuit board unit at the side surface place of battery cell.
In addition, the positive contact sheet is made by metal polar plate, it is carried out annealing in process and is configured as L shaped, wherein its longer side is connected to galvanic anode portion, it is the galvanic anode portion of battery cell, its shorter side is connected to an end of circuit board unit, makes, can make the end face of circuit board unit and frame section overlapping by making positive contact bending tablet approximate right angle at the bend place between longer side and shorter side.
Be configured as the negative contact sheet L shaped in advance, and with another distolateral connection of shorter side with the circuit board unit of negative contact sheet, the longer side of the simultaneously smooth L shaped negative contact sheet parallel with the longer side of positive contact sheet, make by the crooked approximate right angle of shorter side that makes the positive contact sheet end face side circuit board unit and frame section (being the longer side of positive contact sheet) when overlapping, can the side surface of the longer side of negative contact sheet and battery cell is overlapping.
Especially, by the slit on the side surface that is arranged on frame section frame section is inserted at the tip of the longer side of negative contact sheet, the end of the PTC tab of the end of the longer side of negative contact sheet and framework inside is overlapping, and weld overlapping portion by the opening on the side surface that is arranged on frame section, make to be easy to carry out welding job.
Description of drawings
Fig. 1 is the stereogram with the Thin battery structure of wrapping film covering;
Fig. 2 is the exploded perspective view with the Thin battery structure of wrapping film covering;
Fig. 3 is the cross-sectional view of main part;
Fig. 4 is the diagram that shows the assembling process of battery pack;
Fig. 5 is the diagram that shows the assembling process of battery pack;
Fig. 6 is the diagram that shows the assembling process of battery pack;
Fig. 7 is the diagram that shows the assembling process of battery pack;
Fig. 8 is the diagram that shows the assembling process of battery pack;
Fig. 9 is the diagram that shows the assembling process of battery pack;
Figure 10 is the stereogram of conventional batteries;
Figure 11 is the cross-sectional view of conventional batteries; And
Figure 12 is the cross-sectional view of another conventional batteries.
Embodiment
Fig. 1 is the stereogram of battery pack 1, and Fig. 2 is the exploded perspective view of battery pack 1.As shown in Figure 1, battery pack 1 comprises: rectangular battery 2, comprise battery 2 rectangular frame portion 3, be arranged on circuit board unit 4 on the outer surface of frame section 3, the end that is installed in frame section 3 and battery cell 2 is with the cap portion 5 that circuit board unit 4 is clipped in the middle with the outer surface of frame section 3 and covers rectangular battery Battery pack 2 fully and the outer packaging film of frame section 3 (or being called encapsulating film) 6.
On the first side 3a of frame section 3 overlapping on the first side surface 2a of battery cell 2, be formed with galvanic anode portion assembling window 31 to cooperate with galvanic anode portion 21.On the 3rd overlapping on the 3rd side surface 2c of battery cell 2 side 3c, be formed with the window (peristome) 32 relative with the end of PTC tab 22.An end that is used for the slit 34 that negative contact sheet 33 inserts 3c inside, the 3rd side is arranged on the first side surface 3a.
The flange shape protuberance 35 that is used for the bottom of support cells Battery pack 2 is arranged on the bottom of frame section 3.In addition, at the top of frame section 3, be formed with flange shape protuberance 36,35 one-tenth relativenesses of itself and flange shape protuberance along the top edge of the second side 3b.The end clips of the second side surface 2b of battery cell 2 is between these flange shape protuberances 35,36.
The height of the second side 3b of frame section 3 equals when charging or the maximum swelling height (thickness) of the battery cell 3 that is installed under the condition at high temperature substantially.
Circuit board unit installation portion 37 is arranged on the outer surface of the first side surface 3a of frame section 3.Circuit board unit installation portion 37 is formed between a pair of cap support portion 38,38, and this a pair of cap support portion is outstanding from the top and bottom on the outer surface of the first side 3a of frame section 3.On cap support portion 38,38, be formed with a plurality of cap engaging claws 39.
In addition, be connected with the another terminal portion 47 of the other end that is positioned at circuit board unit 4 by the end 33a of welding negative contact sheet 33.Positive contact sheet 45 is formed by the L shaped metallic plate such as the nickel plate.On metal polar plate, carry out so-called annealing in process to be easy to bending.In above-mentioned L shaped positive contact sheet 45, by welding its longer side is connected with the galvanic anode portion 21 of battery cell 2, and the terminal 44 of its shorter side with an end that is positioned at circuit board unit 4 is connected.
The same with positive contact sheet 45, negative contact sheet 33 is same by L shaped forming such as the such metallic plate of nickel plate.In above-mentioned L shaped negative contact sheet 33, the end 33a of its shorter side is connected with the terminal 47 of the other end that is positioned at circuit board unit 4.By the other end 33b insertion frame section 3 of the slit 34 among the 3rd side 3c that is formed on frame section 3, be used for being connected with PTC tab 22 with the longer side of negative contact sheet 33.
On the end face portion 51 of cap portion 5, be provided with the terminal window 53 that the termination contact portion 42 on a plurality of circuit board units 4 is faced.And, on the end face and bottom surface of tube 52, be provided with a plurality of conjugate foramens 54, engage with a plurality of cap engaging claws 39 in a pair of top that is formed on frame section 3 and the bottom support portion 38,38 being used for.
Equally, as shown in Figures 2 and 3, frame section 3 has a plurality of projections 55 of giving prominence to circuit board unit 4, and it is arranged on a pair of top and the bottom cap support portion 38,38.The purpose that projection 55 is set is in abutting connection with the position that electronic component and like are not installed, and will shift mould 43 be clipped in the middle when power is imposed on the termination contact portion 42 of circuit board unit 4 by corresponding terminal.
Wrapping film 6 has the form of the thin slice of about 0.05～0.1mm thickness by making such as polyethylene (PE), PETG (PET) and the such synthetic resin of Merlon (PC).Be installed on the frame section 3 in the inside that battery cell 2 is placed frame section 3, with circuit board unit 4 and like thereof and after placing cap portion 5, with wrapping film parcel frame section 3.Wrapping film 6 wraps up front surface and the back side of frame sections 3 with clad battery Battery pack 2 then, and whole battery cell 2, frame section 3 and the cap portion 5 of connecting.It should be noted that drawing reference numeral " 6a " representative is positioned at the bonding part at the place, end of wrapping film 6, and drawing reference numeral " 56 " is represented the sept on the window portion 32 that will be installed on the 3rd side 3c that is formed on frame section 3.
Fig. 4 to Fig. 9 shows the embodiment of the number of assembling steps of battery pack 1.At first, as shown in Figure 4, insulating paper 23 is connected to the side surface of battery cell 2, the end with PTC tab 22 is welded to cell cathode portion subsequently.Meanwhile, fixedly the other end of PTC tab 22 aligns with the 3rd side surface 2c of battery cell 2 simultaneously.Then, as shown in Figure 5, battery cell 2 is placed in the frame section 3, thereby the end of the second side surface 2b of battery cell 2 is placed between the flange shape protuberance 35,36 that is formed on the frame section 3, and allow galvanic anode portion 21 to be assembled in the galvanic anode portion assembling window 31 of frame section 3, as shown in Figure 6.The end face of PTC tab 22 is to the window portion 32 of frame section 3.
Subsequently, as shown in Figure 7, be welded to the end of the longer side of L shaped positive contact sheet 45 in the galvanic anode portion 21 and install, simultaneously the outer surface of its longer side with the first side 3a of frame section 3 alignd, and an end 45a of the shorter side of L shaped positive contact sheet 45 is welded in place on the portion of terminal 44 of circuit board unit 4 one ends.And, the longer side of L shaped negative contact sheet 33 is set to parallel with the first side 3a of frame section 3, and an end 33a of the shorter side of the longer side of L shaped positive contact sheet 45 by welding L shaped negative contact sheet 33 is installed on the 3a of this first side.
Then, the shorter side crooked basic 180 of positive contact sheet 45 is spent so that circuit board unit 4 is overlapping on the outer surface of the first side 3a of frame section 3 by insulating paper 46, thereby circuit board unit 4 is installed on the circuit board unit installation portion 37.In this case, the other end 33b with negative contact sheet 33 inserts frame section 3 by slit 34.As mentioned above, on the metal polar plate that constitutes positive contact sheet 45, carried out annealing in process, thereby made it be easy to crooked basic 180 degree, therefore prevented from stress is imposed on circuit board unit 4.
Then, as shown in Figure 8, at an end that cap portion 5 is assembled to frame section 3 so that after the covering board unit 4, engage with pawl conjugate foramen 54 in the tube 52 that is formed on cap portion 5 being formed on a pair of top of frame section 3 and a plurality of cap engaging claws 39 on the bottom cap support portion 38,38, thereby cap portion 5 is installed on the frame section 3 securely.And the other end 33b of negative contact sheet 33 that is inserted into frame section 3 inside by the slit in the frame section 3 34 is overlapping on PTC tab 22, and is soldered on the PTC tab 22 in the position towards window portion 32.As mentioned above, by at window portion 32 place's welded cathode tab 33 and PTC tabs 22, make after mounting cap part 5, negative contact sheet 33 and PTC tab 22 are overlapped each other, can regulate the length of negative contact sheet 33 and PTC tab 22, and avoid imposing on circuit board unit 4 by any stress that negative contact sheet 33 will cause owing to the variation of welding position.Behind welded cathode tab 33 and PTC tab 22, sept 56 is installed to window portion 32.At last, wrapping film 6 wraps up a circle at least so that bond end 6a, thereby whole in conjunction with battery cell 2, frame section 3, circuit board unit 4 and cap portion 5, makes battery pack 1 like this.As shown in Figure 9, the wrapping film 6 that can wrap up sets in advance and circularizes so that wrap up, or it also can be flat thin slice.Equally, wrapping film 6 can be that monolithic maybe can be divided into a plurality of thin slices.It should be noted that, as shown in Figure 9, the zone 71 of wrapping film 6 parcel can be formed thinner than other zone 72,73 of not wrapped up by wrapping film 9, thin amount (thickness difference between the two) equals the thickness of the wrapping film 6 that will wrap up, make that the whole outer surface of battery pack 1 becomes same substantially horizontal plane after the parcel wrapping film 6.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (23)
1. Thin battery structure comprises:
Battery cell, described battery cell are flat and approximate rectangular shape;
Frame section, described frame section is installed in described battery cell;
Circuit board unit, described circuit board unit is arranged on the outer surface of described frame section;
Cap portion, described cap portion are installed in an end of described frame section and described battery cell, so that with the outer surface of described frame section described circuit board unit is clipped in the middle; And
Wrapping film, the whole part that covers described cap portion, described battery cell and described frame section of described wrapping film.
2. Thin battery structure according to claim 1, wherein:
Comprise described frame section and described cap portion and be shaped as thinlyyer with the zone of described wrapping film parcel that the amount that approaches is corresponding to the thickness of described wrapping film than the height in the zone of not wrapped up by wrapping film; And
One of at least be set to be higher than the side surface of described battery cell in the outer surface of described frame section.
3. Thin battery structure according to claim 1, wherein said frame section comprises:
Galvanic anode portion assembling window is arranged on a side of described frame section, so that match with the galvanic anode portion of giving prominence to from the side surface of described battery cell; And
The circuit board unit installation portion is arranged on the outer surface of a described side of described frame section, is used to connect described galvanic anode portion.
4. Thin battery structure according to claim 1, wherein said cap portion comprises:
The rectangular end face, the described circuit board unit that is used for will being installed in described frame section installation portion is clipped in the middle; And
Tube, the facial progressive forming of itself and described rectangular end, and department of assembly with outer peripheral portion of an end that will be installed to described frame section and described battery cell.
5. Thin battery structure according to claim 1, wherein:
Described circuit board unit comprises: termination contact portion, from the terminal windows of the end face portion that is arranged on described cap portion towards the outside; And electronic component and being used at transmission mould towards the molded described electronic component in inner surface place of described frame section;
Described frame section comprises protuberance, side-prominent towards described circuit board unit on the surface of described circuit board unit; And
Described circuit board unit is assembled and is fixed by being sandwiched between described frame section and the described cap portion, and has predetermined gap between the end of described transmission mould and described frame section.
6. battery pack, be configured to flattened rectangular, and have comprise termination contact portion and with the vertical first surface of first type surface, with described first surface opposing second surface, first side surface vertical and second side surface relative with described first side surface with described first type surface, described battery pack comprises:
Constitute the circuit board unit of described termination contact portion;
Cap portion, described cap portion comprise have the described first surface that described termination contact portion can be exposed to outside terminal window and with the tube of described first surface progressive forming;
The flattened rectangular battery cell;
Frame section, wherein the main surface portion of described battery cell towards the position be opening, and comprise four side surfaces vertical with described main surface portion, one of them surface is described second surface; And
Wrapping film, its whole described battery cell and described frame section of covering.
7. battery pack according to claim 6, wherein:
Comprise described frame section and described cap portion and be shaped as thinlyyer than the height in the zone of not wrapped up by described wrapping film with the zone of described wrapping film parcel, thin amount is corresponding to the thickness of described wrapping film.
8. battery pack according to claim 6, wherein:
One of at least be configured to be higher than the side surface of described battery cell in the described outer surface of described frame section.
9. battery pack according to claim 6, wherein:
An end of described circuit board unit is connected with the other end of positive contact sheet, and an end of wherein said positive contact sheet is connected with the galvanic anode portion of described battery cell;
The other end of described circuit board unit is connected with an end of negative contact sheet;
The other end of the other end of described negative contact sheet and PTC tab is connected by a weld part, and an end of wherein said PTC tab links to each other with cell cathode portion; And
Described weld part is arranged on one of described first side surface and described second side surface.
10. battery pack according to claim 9, wherein:
Described weld part is positioned to be arranged on the inboard of peristome of the side surface of described frame section.
11. battery pack according to claim 9, wherein:
Described positive contact sheet is configured as L shaped, and wherein the described galvanic anode portion of its longer side and described battery cell is connected, and its shorter side is connected with an end of described circuit board unit.
12. battery pack according to claim 9, wherein:
Described positive contact sheet is formed by a metallic plate, and described metallic plate will carry out annealing in process.
13. battery pack according to claim 9, wherein:
Described negative contact sheet is configured as L shaped, and wherein its shorter side is connected with the other end of described circuit board unit.
14. battery pack according to claim 10, wherein:
The end of the longer side of the other end of described PTC tab and described negative contact sheet is overlapping at described peristome place, one end of wherein said PTC tab is welded on the described cell cathode portion of described battery cell, and the shorter side of described negative contact sheet is connected with the other end of described circuit board unit.
15. battery pack according to claim 14, wherein:
The slit of the side surface of the longer side of described negative contact sheet by being arranged on described frame section is inserted in the described frame section, and overlapping with described PTC tab in described peristome.
16. battery pack according to claim 6, wherein:
Cap support portion in described frame section is provided with the described tube that will be inserted into described cap portion;
Described cap portion is by in the described tube that described cap support portion is inserted described cap portion and link to each other with described frame section.
17. battery pack according to claim 16, wherein;
Cap portion engaging claw and pawl conjugate foramen are arranged on the described tube of described cap support portion and described cap portion; And
When the described tube of described cap portion was inserted in described cap support portion, described cap portion engaging claw and described pawl conjugate foramen were engaged with each other.
18. the manufacture method of a battery pack may further comprise the steps:
Battery is installed in step, is used for the battery cell of flattened rectangular is installed to rectangular frame;
The circuit board unit Connection Step, the circuit board unit that is used for having the terminal connecting portion is connected to described battery cell;
The cap portion installation steps are used for cap portion is installed to described frame section; And
Wrapping film covers step, is used for covering the described frame section that described battery cell is installed by wrapping film.
19. the manufacture method of battery pack according to claim 18, wherein said circuit board unit Connection Step comprises:
Be used for when the end with described positive contact sheet is connected to the galvanic anode portion of described battery cell, the positive contact sheet is offered the step of described battery cell with the end face of described frame section;
Be used for the other end of described positive contact sheet is connected to the step of an end of described circuit board unit;
Be used for when the end with described negative contact sheet is connected to the other end of described circuit board unit, providing the step of the side surface of cell cathode portion and described battery cell;
Be used for when the end with described PTC tab is connected to the described cell cathode portion of described battery cell, providing the step of the side surface of PTC tab and described battery cell; And
The tab welding step is used to weld the end of described PTC tab and described cell cathode portion, overlaps each other simultaneously.
20. the manufacture method of battery pack according to claim 19, wherein:
The step that a described end that is used for described positive contact sheet is connected to the galvanic anode portion of described battery cell comprises:
Be used to connect the step of the galvanic anode portion of the longer side of described positive contact sheet and described battery cell, wherein in described battery cell, described positive contact sheet is made by metallic plate, and described metallic plate will carry out annealing in process, and described positive contact sheet is configured as L shaped; And
Be used for the shorter side of described L shaped positive contact sheet is connected to the step of described circuit board unit.
21. the manufacture method of battery pack according to claim 20, wherein:
The described step that is used for an end of described negative contact sheet is connected to the other end of described circuit board unit, shorter side is connected to the other end of described circuit board unit, simultaneously the longer side of the parallel L shaped negative contact sheet of the longer side of smooth and described positive contact sheet.
22. the manufacture method of battery pack according to claim 20, wherein:
By the slit on the described side surface that is arranged on described frame section the longer side of described L shaped negative contact sheet is inserted described frame section, in described frame section, the shorter side of described negative contact sheet is connected to described circuit board unit, and the end at the longer side of the side surface place negative contact sheet of described battery cell and described PTC tab is overlapping, and this lap welds in described tab welding step.
23. the manufacture method of battery pack according to claim 22, wherein:
The peristome of the side surface of the described welding step that is used for described PTC tab and described negative contact sheet by being arranged on described frame section carries out.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003357471 | 2003-10-17 | ||
| JP2003357471 | 2003-10-17 | ||
| JP2003-357471 | 2003-10-17 |
Publications (2)
| Publication Number | Publication Date |
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| CN1670983A CN1670983A (en) | 2005-09-21 |
| CN100431198C true CN100431198C (en) | 2008-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2004201182259U Expired - Lifetime CN2831446Y (en) | 2003-10-17 | 2004-10-15 | Structure for mounting battery |
| CNB2004100841075A Expired - Fee Related CN100431198C (en) | 2003-10-17 | 2004-10-15 | Thin battery structure using sheath film, battery pack and manufacturing method for the battery pack |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004201182259U Expired - Lifetime CN2831446Y (en) | 2003-10-17 | 2004-10-15 | Structure for mounting battery |
Country Status (13)
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|---|---|
| US (1) | US7964303B2 (en) |
| EP (2) | EP2256843B1 (en) |
| JP (2) | JP5013666B2 (en) |
| KR (1) | KR101093912B1 (en) |
| CN (2) | CN2831446Y (en) |
| AU (1) | AU2004220726B2 (en) |
| DK (1) | DK1524710T3 (en) |
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| MY (1) | MY140550A (en) |
| SG (1) | SG111236A1 (en) |
| TW (1) | TWI283941B (en) |
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|---|---|
| AU2004220726A1 (en) | 2005-05-05 |
| ES2456665T3 (en) | 2014-04-23 |
| JP5234126B2 (en) | 2013-07-10 |
| US20050112415A1 (en) | 2005-05-26 |
| MXPA04010047A (en) | 2005-06-17 |
| KR20050037366A (en) | 2005-04-21 |
| JP2011108663A (en) | 2011-06-02 |
| AU2004220726B2 (en) | 2010-07-01 |
| JP5013666B2 (en) | 2012-08-29 |
| EP1524710B1 (en) | 2014-03-12 |
| TWI283941B (en) | 2007-07-11 |
| EP1524710A3 (en) | 2007-05-02 |
| DK1524710T3 (en) | 2014-04-22 |
| EP2256843A1 (en) | 2010-12-01 |
| CN1670983A (en) | 2005-09-21 |
| EP1524710A2 (en) | 2005-04-20 |
| TW200520287A (en) | 2005-06-16 |
| HK1078378A1 (en) | 2006-03-10 |
| MY140550A (en) | 2009-12-31 |
| KR101093912B1 (en) | 2011-12-13 |
| US7964303B2 (en) | 2011-06-21 |
| SG111236A1 (en) | 2005-05-30 |
| CN2831446Y (en) | 2006-10-25 |
| EP2256843B1 (en) | 2016-03-30 |
| JP2005142153A (en) | 2005-06-02 |
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